syzkaller login: [ 274.756654] BUG: Bad rss-counter state mm:00000000e2bfbb19 type:MM_FILEPAGES val:33 [ 274.757971] BUG: Bad rss-counter state mm:00000000e2bfbb19 type:MM_ANONPAGES val:22 [ 274.996076] ================================================================== [ 274.996989] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 274.997919] Read of size 8 at addr ffff88801a13ea50 by task sshd/219 [ 274.998698] [ 274.998920] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 275.000122] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 275.001098] Call Trace: [ 275.001417] [ 275.001705] dump_stack_lvl+0x91/0xf0 [ 275.002209] print_report+0xcc/0x620 [ 275.002727] ? __virt_addr_valid+0x102/0x340 [ 275.003295] ? vma_interval_tree_remove+0xc75/0xec0 [ 275.003926] ? vma_interval_tree_remove+0xc75/0xec0 [ 275.004557] kasan_report+0xbe/0xf0 [ 275.005041] ? vma_interval_tree_remove+0xc75/0xec0 [ 275.005673] vma_interval_tree_remove+0xc75/0xec0 [ 275.006286] vma_prepare+0xc54/0x11a0 [ 275.006771] __split_vma+0x5af/0x950 [ 275.007244] ? __pfx___split_vma+0x10/0x10 [ 275.007769] ? find_held_lock+0x2c/0x110 [ 275.008294] do_vmi_align_munmap+0x2ba/0x11f0 [ 275.008869] ? lock_is_held_type+0x9f/0x120 [ 275.009410] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 275.010026] ? mtree_range_walk+0x632/0x900 [ 275.010588] ? mas_walk+0x5c7/0x7c0 [ 275.011076] do_vmi_munmap+0x1f1/0x2b0 [ 275.011569] mmap_region+0x1f9/0x2660 [ 275.012050] ? vm_mmap_pgoff+0x15c/0x3a0 [ 275.012560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 275.013275] ? __pfx_lock_acquire+0x10/0x10 [ 275.013807] ? __pfx_mmap_region+0x10/0x10 [ 275.014359] ? security_mmap_addr+0x7d/0xa0 [ 275.014887] ? get_unmapped_area+0x1f5/0x3f0 [ 275.015442] do_mmap+0x854/0xf00 [ 275.015896] vm_mmap_pgoff+0x1a6/0x3a0 [ 275.016396] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 275.016964] ksys_mmap_pgoff+0x3af/0x500 [ 275.017469] do_syscall_64+0x3f/0x90 [ 275.017947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 275.018608] RIP: 0033:0x7f21d71bfd82 [ 275.019066] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 275.021185] RSP: 002b:00007ffc07998d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 275.022085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f21d71bfd82 [ 275.022937] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f21d65f9000 [ 275.023781] RBP: 00007f21d65f9000 R08: 0000000000000009 R09: 0000000000001000 [ 275.024628] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621c46deec0 [ 275.025472] R13: 00007ffc07998da0 R14: 00007ffc07998dd0 R15: 00007ffc07999130 [ 275.026337] [ 275.026634] [ 275.026849] Allocated by task 212: [ 275.027283] kasan_save_stack+0x22/0x50 [ 275.027797] kasan_set_track+0x25/0x30 [ 275.028296] __kasan_slab_alloc+0x59/0x70 [ 275.028822] kmem_cache_alloc+0x16b/0x370 [ 275.029344] vm_area_dup+0x20/0x160 [ 275.029806] __split_vma+0x170/0x950 [ 275.030276] split_vma+0xc6/0x110 [ 275.030716] mprotect_fixup+0x8d2/0xb30 [ 275.031223] do_mprotect_pkey+0x87e/0xd40 [ 275.031740] __x64_sys_mprotect+0x78/0xc0 [ 275.032264] do_syscall_64+0x3f/0x90 [ 275.032743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 275.033389] [ 275.033606] Freed by task 212: [ 275.034008] kasan_save_stack+0x22/0x50 [ 275.034533] kasan_set_track+0x25/0x30 [ 275.035031] kasan_save_free_info+0x2b/0x50 [ 275.035564] __kasan_slab_free+0x10a/0x190 [ 275.036101] kmem_cache_free+0x10d/0x4d0 [ 275.036613] rcu_core+0x8c8/0x2860 [ 275.037065] __do_softirq+0x1b7/0x7d4 [ 275.037539] [ 275.037752] Last potentially related work creation: [ 275.038357] kasan_save_stack+0x22/0x50 [ 275.038860] __kasan_record_aux_stack+0x8e/0xa0 [ 275.039443] __call_rcu_common.constprop.0+0x6a/0xb90 [ 275.040087] remove_vma+0x139/0x170 [ 275.040538] do_vmi_align_munmap+0xd4a/0x11f0 [ 275.041096] do_vmi_munmap+0x1f1/0x2b0 [ 275.041583] __vm_munmap+0x138/0x3a0 [ 275.042055] __x64_sys_munmap+0x59/0x80 [ 275.042564] do_syscall_64+0x3f/0x90 [ 275.043036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 275.043684] [ 275.043905] The buggy address belongs to the object at ffff88801a13e9f8 [ 275.043905] which belongs to the cache vm_area_struct of size 168 [ 275.045406] The buggy address is located 88 bytes inside of [ 275.045406] freed 168-byte region [ffff88801a13e9f8, ffff88801a13eaa0) [ 275.046852] [ 275.047076] The buggy address belongs to the physical page: [ 275.047731] page:00000000b3bb2476 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a13e [ 275.048830] memcg:ffff88800cb6ab01 [ 275.049262] flags: 0x100000000000200(slab|node=0|zone=1) [ 275.049921] page_type: 0xffffffff() [ 275.050376] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 275.051298] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb6ab01 [ 275.052207] page dumped because: kasan: bad access detected [ 275.052867] [ 275.053090] Memory state around the buggy address: [ 275.053679] ffff88801a13e900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 275.054547] ffff88801a13e980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 275.055404] >ffff88801a13ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 275.056258] ^ [ 275.056956] ffff88801a13ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 275.057824] ffff88801a13eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 275.058709] ================================================================== [ 275.059689] Disabling lock debugging due to kernel taint [ 276.946153] sshd (219) used greatest stack depth: 24424 bytes left [ 276.949040] BUG: Bad rss-counter state mm:0000000058f5d067 type:MM_FILEPAGES val:33 [ 276.950020] BUG: Bad rss-counter state mm:0000000058f5d067 type:MM_ANONPAGES val:22 [ 277.407647] BUG: Bad rss-counter state mm:00000000e1d2893e type:MM_FILEPAGES val:33 [ 277.408962] BUG: Bad rss-counter state mm:00000000e1d2893e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48280' (ECDSA) to the list of known hosts. 2023/06/19 21:19:04 fuzzer started 2023/06/19 21:19:04 dialing manager at localhost:44161 2023/06/19 21:19:04 checking machine... 2023/06/19 21:19:04 checking revisions... [ 278.170299] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:19:04 testing simple program... [ 278.215248] cgroup: Unknown subsys name 'net' [ 278.251578] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:15:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff888019fb7bb8 RDI=ffff88806ce09aa8 RBP=ffff888019fb7bb8 RSP=ffff88806ce099f0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000001a762 R12=0000000000000008 R13=ffff888019fb0000 R14=ffff888019fb7bb8 R15=ffff88806ce09a98 RIP=ffffffff8113046e RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007facf4e98700 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f9cb0bc9618 CR3=0000000016976000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2034303a39313a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a39313a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801b80e5c0 RCX=0000000000000000 RDX=ffff88801b80e5c0 RSI=ffffffff81852578 RDI=0000000000000007 RBP=ffff88800c157028 RSP=ffff8880169b7a90 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000001 R12=0000000000000000 R13=ffff88800a027a80 R14=0000000000000020 R15=0000000000000004 RIP=ffffffff81852585 RFL=00000293 [--S-A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9cb0612900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=000055e7d6946954 CR3=000000000e736000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000